Finding the Fourth Proportional to 978.48, 1,454.82 and 968.72

Step by Step Solution

1. Step 1: Write the proportion equation
   978.48 : 1,454.82 = 968.72 : x
2. Step 2: Convert to fraction form
   978.48/1,454.82 = 968.72/x
3. Step 3: Cross multiply
   978.48x = 1,454.82 × 968.72
4. Step 4: Simplify right side
   978.48x = 1,409,313.23
5. Step 5: Solve for x
   x = 1,409,313.23/978.48
6. Step 6: Final answer
   x = 1,440.31